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Gewählte Master / Diploma Thesis:

Johannes Pichler (2015): Entmischungsvorgänge von mineralischen Mischdüngern innerhalb der Logistikkette und deren möglichen Auswirkungen auf die Nährstoffverteilung am Feld.
Master / Diploma Thesis - Institut für Landtechnik, BOKU-Universität für Bodenkultur, pp 179. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The amounts of bulk-blends have increased in fertilization practice because of new demands and partly due to lower costs for specific formulations of blends. Within three logistic systems (truck-trailer, tank truck and big bag) the segregation of three different mineral bulk-blends were analysed. Blend 1 consisted of 50 % CAN and 50 % complex fertilizer; Blend 2 consisted of 33 % CAN, 33 % complex fertilizer and 33 % MOP and Blend 3 consisted of 50 % CAN and 50 % MOP. After mixing of each blend (à 25 tons) a material cone was formed from which the samples were drawn with a sampling insertion device at 30 cm and 80 cm at three levels of the cone (bottom, middle, top). Further samples were drawn after transporting the blends. 127 fertilizer samples were analysed chemically and for their grain size distribution. Selected results show: A systematic sampling shows approximately the nutrient distribution in the material cone and can differ from the randomized sampling. The increasing proportion of MOP with its angular grain in the blend results in a segregation in the material cone. MOP has accumulated at the top of the cone, whereas the round grains of CAN were rolling down to the bottom. After a theoretical consideration, the segregation in Blend 3 can lead to a 38 % lower N- and 40 % higher K2O-amount. Only Blend 1 was found within the maximum tolerable nutrient deviations according to EU fertilizer legislation.

Beurteilende(r): Gronauer Andreas
1.Mitwirkender: Moitzi Gerhard

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